<script setup>
import {Lock, User} from '@element-plus/icons-vue'
import {ref, watch} from 'vue'
import {userRegisterService, userLoginService} from '@/api/user'
import {useUserStore} from "@/stores";
import {useRouter} from "vue-router";

const isRegister = ref(false)

const ruleForm = ref({
  username: '',
  password: '',
  repassword: ''
})

// 确认密码自定义校验
const validatePass = (rule, value, callback) => {
  if (value !== ruleForm.value.password) {
    callback(new Error("两次密码不一致"))
  } else {
    callback()
  }
}

// 表单元素规则校验
const rules = {
  username: [
    {required: true, message: '请输入用户名', trigger: 'blur'},
    {min: 5, max: 10, message: '用户名必须是5-10位的字符', trigger: 'blur'}
  ],
  password: [
    {required: true, message: '请输入密码', trigger: 'blur'},
    {pattern: /^\S{6,15}$/, message: '密码必须是6-15位的非空字符', trigger: 'blur'}
  ],
  repassword: [
    {required: true, message: '请再次输入密码', trigger: 'blur'},
    {pattern: /^\S{6,15}$/, message: '密码必须是6-15位的非空字符', trigger: 'blur'},
    {validator: validatePass, trigger: 'blur'}
  ]
}

const form = ref()

// 注册
const register = async () => {
  await form.value.validate()
  await userRegisterService(ruleForm.value)
  ElMessage.success('注册成功')
  isRegister.value = false
}

// 登录
const userStore = useUserStore()
const router = useRouter()
const login = async () => {
  await form.value.validate()
  const res = await userLoginService(ruleForm.value)
  ElMessage.success('登录成功')
  // token存入pinia
  userStore.setToken(res.token)
  // 跳转到首页
  router.push('/')
}

// 监听isRegister变化，重置表单
watch(isRegister, () => {
  ruleForm.value = {
    username: '',
    password: '',
    repassword: ''
  }
})
</script>

<template>
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
      <el-form :model="ruleForm" :rules="rules" ref="form" size="large" autocomplete="off"
               v-if="isRegister">
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input v-model="ruleForm.username" :prefix-icon="User"
                    placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="ruleForm.password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item prop="repassword">
          <el-input
            v-model="ruleForm.repassword"
            :prefix-icon="Lock"
            type="password"
            placeholder="请再次输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item>
          <el-button @click="register" class="button" type="primary" auto-insert-space>
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false">
            ← 返回
          </el-link>
        </el-form-item>
      </el-form>
      <el-form :model="ruleForm" :rules="rules" ref="form" size="large" autocomplete="off" v-else>
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input v-model="ruleForm.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="ruleForm.password"
            name="password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="'never'">忘记密码？</el-link>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button @click="login" class="button" type="primary" auto-insert-space
          >登录
          </el-button
          >
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="'never'" @click="isRegister = true">
            注册 →
          </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
.login-page {
  height: 100vh;
  background-color: #fff;

  .bg {
    background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
    url('@/assets/login_bg.jpg') no-repeat center / cover;
    border-radius: 0 20px 20px 0;
  }

  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;

    .title {
      margin: 0 auto;
    }

    .button {
      width: 100%;
    }

    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>
